alejack12001
Experienced Member
I have an issue with a IBM PC-XT/286 that uses a Baby AT motherboard that seems to be hung up within POST. First, this is not an actual IBM PC-XT/286 motherboard. The motherboard is made by Informtech International Inc as a Baby AT 80286 10-MHz with 1-MB RAM. The motherboard uses Chips and Technologies with Award BIOS dated from 1984-1986. I have not been able to get this motherboard beyond POST.
I have a POST analyzer, which I have inserted in a 8-bit ISA slot. When I turn on the POST Analyzer the LED’s all light except for the reset; if I engage the reset button the light doesn’t come one. The digital display shows an error at 15 for the left digit and 14 for the right. Apparently, the right two digits precede the left two digits. According to the PC analyzer manual for Award BIOS, the error for code 14: test 8254 timer 0 counter 2 and error code 15 is “verify 8259 Channel 1 Interrupts by Turning off/on the interrupt links.
I found a chip on the motherboard that is NEC product PD71054, which according to its data sheet is a high-performance programmable timer/counter designed for timing control applications in microcomputer systems. This chip is a replacement for the 8254 by the maker of the board. In addition, I found the NEC D8259AC-2 Chip, which programmable interval timer.
If these chips are defective, is this motherboard no longer usable?
I have a POST analyzer, which I have inserted in a 8-bit ISA slot. When I turn on the POST Analyzer the LED’s all light except for the reset; if I engage the reset button the light doesn’t come one. The digital display shows an error at 15 for the left digit and 14 for the right. Apparently, the right two digits precede the left two digits. According to the PC analyzer manual for Award BIOS, the error for code 14: test 8254 timer 0 counter 2 and error code 15 is “verify 8259 Channel 1 Interrupts by Turning off/on the interrupt links.
I found a chip on the motherboard that is NEC product PD71054, which according to its data sheet is a high-performance programmable timer/counter designed for timing control applications in microcomputer systems. This chip is a replacement for the 8254 by the maker of the board. In addition, I found the NEC D8259AC-2 Chip, which programmable interval timer.
If these chips are defective, is this motherboard no longer usable?